Permatex 81878, Silicone, Copper Maximum Temp Gasket Maker Industrial Sealant, 3 oz
Permatex 81878, Silicone, Copper Maximum Temp Gasket Maker Industrial Sealant, 3 oz
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Permatex 81878, Silicone, Copper Maximum Temp Gasket Maker Industrial Sealant, 3 oz

Key item features

  • Extreme Temperature: This copper-based silicone gasket maker is engineered for high operating temperatures, withstanding a continuous range from -65°F to 700°F (-54°C to 371°C) and intermittent peaks.
  • Specialized Applications: Ideal for demanding environments, it is specifically designed for use in turbocharger applications and exhaust systems where high heat resistance is crucial.
  • Fluid Resistance: The sealant effectively resists degradation from various automotive and shop fluids, ensuring long-lasting performance and seal integrity.
  • Vibration Dampening: Formulated to resist vibration, this gasket maker maintains a secure seal even in dynamic and high-stress operational conditions.
  • Engine Safe: Featuring a sensor-safe, low odor, and non-corrosive formulation, it protects sensitive engine components and ensures compatibility with modern vehicle systems.
  • OEM Exceeding: Tested to surpass original equipment manufacturer (OEM) specifications, providing reliable performance for critical sealing needs.
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Sold and shipped by JBTools
4.420759962928638 stars out of 5, based on 2158 seller reviews(4.4)
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4.8 out of 5 stars
stars33 ratings30 reviews
How item rating is calculated
  1. 5 stars85% (28)
  2. 4 stars15% (5)
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Showing 1-3 of 30 reviews

Feb 15, 2026
Landon P
5 out of 5 stars review

Seller Verified Purchase

Works great

Worked breath repacking my silencer and was a pretty fast cure haven't noticed any splooge where I applied it either

Review from Rocky Mountain ATV
Helpful?2YGD96UY6ZQS19278837
Feb 11, 2025
Robert
Sold and shipped byHeintz Sales
5 out of 5 stars review

Verified Purchase

Sealed Hole In Muffler

The product worked as advertised.

Incentivized Review
Helpful?2YGD96UY6ZQS19278837
Jun 16, 2018
Steve A
5 out of 5 stars review

Seller Verified Purchase

Replaces missing gasket/spacer/seal

Our 1999 YZ125 is supposed to have a rubber-like spacer/seal between the header and the silencer. It comes with neither, a replacement pipe or replacement silencer. Instructions indicate to make sure to use the original. Well shucks, we bought used and it is gone, producing a nasty leak. I applied plenty of this stuff. Let it cure before using the bike and it sealed the joint perfectly. Very happy. -m-1999 YAMAHA YZ125--

Review from Rocky Mountain ATV
Helpful?2YGD96UY6ZQS19278837